Porsche 928 GT1991, Owner'S Manual

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Emergency starting with
jumper cables
WARNING
• Improper use of booster battery to start
a vehicle may cause an explosion.
• Lead-acid batteries generate explosive
gases. Keep sparks, flames and lighted
cigarettes away from batteries.
• Do not charge a frozen battery, thaw it
out first. Gas trapped in the ice may
cause an explosion.
• No attempt should be made to jump
start any vehicle with a low electrolyte
level in the battery.
• Check electrolyte level of each cell. If
necessary, fill with distilled water to just
above plates.
• Make sure the voltage of both batteries
is the same.
• The capacity (Ah) of the booster battery
should not be lower than that of the dis­
charged battery.
• Vehicle with discharged battery: turn off
lights and accessories, remove key,
move lever to Ν or Ρ and set parking
brake.
• Vehicle with booster battery should not
be running. Disconnect ground cable.
• Remove vent caps from booster battery
and discharged battery. Preferably lay a
cloth over open vents to reduce explo­
sion hazard.
How to use jumper cables
WARNING
• To avoid serious personal injury and
damage to the vehicle, heed all warn­
ings and instructions of the jumper
cable manufacturer.
• Only jumper cables of adequate diame­
ter cross-section and fitted with insu­
lated alligator clips should be used.
• The jumper cables must be long enough
so that neither vehicles nor cables touch
another.
• When connecting jumper cables, make
sure that they cannot get caught in any
moving parts in the engine compartment.
Improper hook-up of jumper cables can
ruin the alternator.
Always connect POSITIVE (+) to POSITIVE
(+), and NEGATIVE (-) to NEGATIVE
(-).
1. Connect camp of plus-cable to positive
(+) terminal of discharged battery.
2. Connect camp on opposite end of cable
to positive (+) terminal of booster battery.
3. Connect camp of minus-cable to nega­
tive (-) terminal of booster battery.
4. Connect camp on opposite end of cable
to a bare metal part of car with dis­
charged battery. Connect clamp as far
away from battery as possible.
5. Start engine in the usual manner. If engine
fails to start, do not continue to crank but
contact nearest workshop.
6. With engine running, remove jumper ca­
bles from both cars in exact reverse
order: Steps 4 through 1.
7. Reconnect ground cable of booster bat­
tery.
A - Discharged Battery
Β - Booster Battery
Do not try to start car by pushing or tow­
ing. Damage to the catalytic converter,
the transmission, and/or other compo­
nents of the car may result.
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